GeoIpLocation - 如何获取州和县？ （或者，如何从邮政编码获取州和县）C#

Question

我正在使用一种方法从 IP 地址获取 IipLocation 对象。这是 returns Location 对象的代码：

public IIpLocation GetIpLocation(IPAddress ipAddress)
{
    ipAddress.CheckNull("ipAddress");

    IIpLocation ipLocation = null;
    try
    {
        //Try to look up the location using MaxMind.
        Location location = GetMaxMindIpLocation(ipAddress);

        //If the postal code is not present, then try to look it up with GeoNames.
        if (location != null && (location.PostalCode == null || location.PostalCode.Equals("")))
        {
            location.PostalCode = GetPostalCodeFromGeoNames(location);
        }

        if (location != null)
        {
            ipLocation = new GeoIpLocation(location);
        }
    }
    catch (NullReferenceException)
    {
        Log.ErrorFormat(Resources.log_maxMindLookupFailed, ipAddress);
    }

    return ipLocation;
}

IipLocation 对象具有以下属性：Region、RegionName、CountryCode、City、Postal Code、Latitude、Longitude。但是，我需要州和县。如何从我拥有的信息中获取州和县？

Answer 1

使用Census Block Conversions API完成这个。

例如：

http://data.fcc.gov/api/block/find?format=json&latitude=28.35975&longitude=-81.421988&showall=true